Family members embrace as they wait for news of their relatives outside a quake-collapsed seven-story building in Mexico City's Roma Norte neighborhood, Friday, Sept. 22, 2017. Mexican officials are promising to keep up the search for survivors as rescue operations stretch into a fourth day following Tuesday's major earthquake that devastated Mexico City and nearby states. (AP Photo/Rebecca Blackwell)
Family members embrace as they wait for news of their relatives outside a quake-collapsed seven-story building in Mexico City's Roma Norte neighborhood, Friday, Sept. 22, 2017. Mexican officials are promising to keep up the search for survivors as rescue operations stretch into a fourth day following Tuesday's major earthquake that devastated Mexico City and nearby states. (AP Photo/Rebecca Blackwell) Credit: Rebecca Blackwell

Hope mixed with fear Friday on a 60-foot stretch of a bike lane in downtown Mexico City, where families huddled under tarps and donated blankets, awaiting word of their loved ones trapped in the four-story-high pile of rubble behind them.

On Day 4 of the search for survivors of the 7.1-magnitude earthquake that brought down the seven-floor office building and many others, killing at least 293 people, hope rose and fell on the small things. A change in the weather, word that Japanese rescuers โ€“ strangers from half a world away โ€“ had joined the recovery effort, officialsโ€™ assurances that people remained alive inside, a call from a familiar number.

For Patricia Fernandez Romero, who spent the morning on a yellow folding stool under a handwritten list with the names of the 46 missing, it was remembering how badly her 27-year-old son, Ivan Colin Fernandez, sang and realizing how much she wanted to hear him again.

โ€œThere are moments when you feel like youโ€™re breaking down,โ€ Fernandez said. โ€œAnd there are moments when youโ€™re a little calmer. … They are all moments that you wouldnโ€™t wish on anyone.โ€

The families have been camped out since the quake hit Tuesday. More than half of the dead โ€“155 โ€“ perished in the capital, while another 73 died in the state of Morelos, 45 in Puebla, 13 in Mexico State, six in Guerrero and one in Oaxaca.

Along the bike lane, where families slept in tents, accepting food and coffee from strangers, people have organized to present a united front to authorities, who they pressed ceaselessly for information about their loved ones.

They were told that water and food had been passed along to at least some of those trapped inside. On Friday morning, after hours of inactivity blamed on rain, rescuers were readying to re-enter the site, joined by teams from Japan and Israel. Fernandez said officials told them they knew where people were trapped on the fourth floor.

Itโ€™s the moments between those bits of information that torment the families.

โ€œItโ€™s that you get to a point when youโ€™re so tense, when they donโ€™t come out to give us information,โ€ she said. โ€œItโ€™s so infuriating.โ€

Jose Gutierrez, a civil engineer attached to the rescue who has a relative trapped in the wreckage, gathered other families of the missing to let them know what was going on.

โ€œMy family is in there. I want them to get out,โ€ Gutierrez said, his voice breaking. โ€œSo … we go onward.โ€

A roller coaster of emotions played out on Friday for Roberta Villegas Miguel, who was awaiting word of her 37-year-old son, Paulino Estrada Villegas, an accountant who worked on the fourth floor and is married with two young daughters.

Wrapped in a fuzzy turquoise blanket against the morning chill she said that her daughter-in-law was contacted by a friend who said she had received a call from a cell number that belonged to her son, but there was no conversation. Her daughter-in-law ran to authorities with the information, but hours later returned to say that it was her husbandโ€™s old cell number. At first they held out hope that he had given his old phoneโ€™s SIM card to a co-worker who was using it to call out of the building. But eventually authorities traced the call to Queretaro state, extinguishing the latest glimmer of hope.

The arrival of rain late Thursday and the resulting work suspension drove Villegasโ€™ optimism down. But Friday morning the arrival of the Japanese rescuers buoyed her once again.

โ€œWe want to be hopeful,โ€ Villegas said. โ€œWe donโ€™t want to lose faith.โ€

Francisco Javier Mendez, whose daughter, Ana Laura, is also believed trapped inside the building, said his family had been told there were three points inside the collapsed structure where rescuers believe there are people, but only one where there are signs of life.

โ€œThey know because they have detected the warmth,โ€ he said. โ€œWhat they donโ€™t know is how many or how long they will last. Maybe six, they said.โ€